Cooler for reclaimed liquor and gas in paper-pulp processes



June 5, w23;

G. F. SHEVLIN COOLER FOR RECLAIMED LIQUOR AND GAS IN PAPER PULPPROCESSES Filed Dec. 19

l 4 rra 4 RMN@ E Il l|\ Rv .mw EN, L \l|l\/ n f. mw @E QN mm. SWNN WN..

1 HMH@ L u L June 5, 1923.

G. F. SHEVLIN COOLER PoR RECLAIMED LIQUOR AND GAS 1N PAPER PULPPROCESSES 2 Sheets-Sheet 2 Filed Dec. 19, 1921 I Patented .lune 5,192.3. l l

narran .armas GEORGE F. SHEVLIN, OF GLENS FALLS, NEW YORK.

COOLER FOR BECLAITJED LQUOR AND GAS IN 'PAPER-PULF PROCESSES.

Application led December 19, 1921.

To all whom t may concern: p

Be it known that l, GEORGE F-. SHEVLIN, a citizen of the United States,residing at Glens Falls, in the county of Warren and State of New York,have invented an lmp'rovement in Coolers for Reclaimed Liquor and Gas inPaper-Pulp Processes, of which the following is a specification.

In the manufacture of paper from wood and particularly in that portionof the process in which the pulp is treated in suitable digesters by thenecessary gases and liquid, it is desirable to reclaim as much of theliquor as possible `and to cool the same to approximately thetemperature of the mill so that subsequently the liquor may bestrengthened and reemployed in the digester. In the use of this liquorthe gases escape at a predetermined temperature an in order to obviatethis the Iacid and gas should be maintained wherever possible below thistemperature. l am aware that heretofore in coolers of the nature towhich this invention relates the liquor and gases have been cooled byybeing passed through a vessel provided with tubes for circulating water,the vessel being made of suitable metal which is not readily attacked bythe acid. Irrespective, however, 0f the material of which this vessel ismade l have found that the incoming liquor and gases have a tendency toattack-the tubes which are first reached to a greater extent than thosearound which the liquor and gases subsequently pass, and in order toovercome this difficulty l employ in an 'apparatus of this type asuitable device such for example as a baffle plate placed between theinlet pipe and the vessel in such a manner that the incoming' liquor andacids are caused to spread and fill the vessel and pass through or bythe baffle plate before reaching the tubes which are nearest the inletpipe so as to obviate as much as possible the attack which is made bythe liquor and acids on these tubes thereby materially increasing theuseful life of all the tubes which are employed in the vessel, and theparticular construction of my present invention will be hereinafter moreparticularly described.

ln the drawing:

Fig. 1 is a side elevation and partial section made in accordance withmy invention.

Fig. 2 is a sectional plan on an enlarged in sections which f tom wallv14C i is the acid liquor. is made in two parts illustrated at 23 and.24.

illustrating the cooling apparatus' Serial No. 523,292.

scale showing the vessel'forming part of the invention. i

Fig. 3 is a section taken on line 3-3, Fig. 2, and f 'I i Figa-1 1s aplan of the baffle plate employedL in the cooling vessel.

Referring to the drawing it will be seen;l that in carrying out theinvention I employ a tank which is preferably rectangular and is made upof side walls 10 and 11,

lend walls 12 and 1 3 and a bottom 14, the

walls as indicated being preferably made;-

are suitably united. llithin the tank and spaced from the bot- ;atransverse wall 15. As indicated this is supported by the arches orbridges 16 placed in suitably spaced positions and in which there areopenings d indicated at 17, 18, 19 and 20. ln a suitable .position in awall of the tank there is an .inlet 21 for the circulating -water orother ina suitable position H medium, and also preferably oppositelydisposed to the inlet is an overflow or outlet 22.

`Within this tank l employ a vessel which is preferably made in partsand of any suitable material not readily attacked byl As illustratedthis vessel Ahese are `similarly, constructed and adapted to be securedto one another to form the vessel for receiving the liquor and acid tobe cooled. rllhe section 23 is provided with a flange 25 and the section24 with a similar flange 26, which flanges are connected by bolts 27 orotherwise to secure the parts ofthe vessel together and to complete thechamber in which the liquor and acids are received and through whichthey are caused to fiow during the cooling operation. lnthis vesselthere are series of tubes or pipes indicated at 28 and 29. These ,arepreferably elongated and are open at the top and the bottom of thevessel providing passages 30 and 31 respectively which exten d entirelythrough the vessel from the bottom to the top thereof so as to per* mitthe circulating water 0r other medium to flow upwardly through thesetubes in order to Vabsorb the heat transmitted to the tubes by theliquor and gases and thereby cool the liquor and gases as the same passthrough the vessel.

At the ends of the vessel the parts thereof are provided with flanges 32and 33 and the sides of the vessel are preferably cor rugated asindicated at'34-v so asito increase as far as possible the surfacebrought vinto con-l tact with the cireulating.` inkedi,iiin.v-` The ange32 at one end of the vessel Whichy as indicated is? the receivnov endisconnected;u

to an intake pipe 3,5.y ?I`he adjacent end of this pipe is flared asvvindicated at 36 andl iianged as indicated at 37 to correspond in outlinewith the' end of the vessel when the parts are connected so that theflangesV1 32 and' 37 may be connected by suitable bolts 38 or otherwiseWith a baiile 39 intervening 'between thel flanges". Inthis baie thereare apertures or perforations indicated at 40 through which. the liquorand' acids are caused to" pass before they reach the nearest adjacenttubes in the coolin vessel". It will l beapparent from the position ofthis battle as clearly indicatedv in-Figs. l and 2 the li'qnor'a'ndacids after' passing through the intake pipe are permitted to spread andthe rate of' theflovvofj the same is thereby correspondingly decreasedbefore the same ypass through the baille into the main cham- 'ber of thevessel and' consequently this action takes placeibefore' the liquor andacids come into' contact -with these tubes: As hereinbeihre statedr Ihavel found' that this employlment of the baiile'plate as describedmaterially decreases the attacking action ot the liquor" and acids andthereby increases the usefulv life of the tubes extendingthrough l thevessel:

. The liquor and acids frointhe digesters fare conveyed from' thedigestersl through the pipe 4,1 which is connected to the intake pipe Atthejopposae @mi of the Vessel and valso lyingfvvith-in the tank thereis' an outlet pipe 42' similar in all respects to the intajke pipe" andconnected tothe parts of the vessel inthe same-manner with theexceptionof" the omission of the baiiie plate which it is not necessary to employat this' end of' the apparatusfe'xcept in instances Whereas isfpossiblethe' pipingis'- suclr as to provide for a y y theL vessel.

to that ot the inlet 'said vessel:

reversal of the direction of the HOvv through This outlet. pipe isconnected to adi-scharge pipe 43 through which the cooled liquor andacids are conveyed to a suitable tank or other place to` be strengthenedif necessary and to be ready for re-use in the digesters; v

I claim as iny invention: l. Acooler foi-"reclaiming liquor'and gasesinl paper pulp processes comprising a tank, a vessel havinga pluralityof tubes extending therethrough, an inlet pipe, and means between theinlet pipey and the tubes ini the vessel for preventing the liquor and`gases from coming into direct contact With the said tubes upon enteringthe said vessel'.v

21' `cooler for reclaiming` liquor4 and gases in paper'- pulp processescomprising a tank, an inlet pipe for thel vliquor and gas extendingthrough a Wall" Aof the tank, vessel, the capaci-ty of Which'is lai-gerelatively pipe so that the liquor and gas are retarded upon enteringthe vessel, a plurality of tubes extending tl'irough the'said vessel',and a bailie plate secured yin position betweeny the said inlet ypipeand' the tubesot the vessel for preventing the gas and liquor fromcoming directly into contant with the said tubes When first entering the3. A; cooler forreclaimin'g liquor and gases paper pulp processescomprising tank,

tie said tankand having an enlarged end therein, a vessel placed in thesaidf tank and `crmi'orining to the-flared end of the said inlet pipe, aplurality oftu'besextending through the said vessel from the bottom tothe top thereof, and? ag baffle plate having holes therein secured inposition between the 'ared endof the inlet pipe and the adjacent end ofthe saidvessel. Y Y

Signed by ine this l3thday of December,

192i. eno. F. sHnvLiN.-'

aninlet pipe extending through a Wallv oi

